FreeBSD-5.3/sys/netatm/uni/sscf_uni.c
/*
* ===================================
* HARP | Host ATM Research Platform
* ===================================
*
*
* This Host ATM Research Platform ("HARP") file (the "Software") is
* made available by Network Computing Services, Inc. ("NetworkCS")
* "AS IS". NetworkCS does not provide maintenance, improvements or
* support of any kind.
*
* NETWORKCS MAKES NO WARRANTIES OR REPRESENTATIONS, EXPRESS OR IMPLIED,
* INCLUDING, BUT NOT LIMITED TO, IMPLIED WARRANTIES OF MERCHANTABILITY
* AND FITNESS FOR A PARTICULAR PURPOSE, AS TO ANY ELEMENT OF THE
* SOFTWARE OR ANY SUPPORT PROVIDED IN CONNECTION WITH THIS SOFTWARE.
* In no event shall NetworkCS be responsible for any damages, including
* but not limited to consequential damages, arising from or relating to
* any use of the Software or related support.
*
* Copyright 1994-1998 Network Computing Services, Inc.
*
* Copies of this Software may be made, however, the above copyright
* notice must be reproduced on all copies.
*/
/*
* ATM Forum UNI Support
* ---------------------
*
* Signalling AAL SSCF at the UNI
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/sys/netatm/uni/sscf_uni.c,v 1.21 2003/07/24 12:24:41 harti Exp $");
#include <sys/param.h>
#include <sys/types.h>
#include <sys/systm.h>
#include <sys/errno.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/socketvar.h>
#include <sys/syslog.h>
#include <net/if.h>
#include <netatm/port.h>
#include <netatm/queue.h>
#include <netatm/atm.h>
#include <netatm/atm_sys.h>
#include <netatm/atm_sap.h>
#include <netatm/atm_cm.h>
#include <netatm/atm_if.h>
#include <netatm/atm_vc.h>
#include <netatm/atm_stack.h>
#include <netatm/atm_pcb.h>
#include <netatm/atm_var.h>
#include <netatm/uni/uni.h>
#include <netatm/uni/sscf_uni_var.h>
#include <vm/uma.h>
/*
* Global variables
*/
int sscf_uni_vccnt = 0;
/*
* Local functions
*/
static int sscf_uni_inst(struct stack_defn **, Atm_connvc *);
/*
* Local variables
*/
uma_zone_t sscf_uni_zone;
static struct stack_defn sscf_uni_service = {
NULL,
SAP_SSCF_UNI,
0,
sscf_uni_inst,
sscf_uni_lower,
sscf_uni_upper,
0
};
static struct t_atm_cause sscf_uni_cause = {
T_ATM_ITU_CODING,
T_ATM_LOC_USER,
T_ATM_CAUSE_TEMPORARY_FAILURE,
{0, 0, 0, 0}
};
/*
* Initialize SSCF UNI processing
*
* This will be called during module loading. We will register our stack
* service and wait for someone to talk to us.
*
* Arguments:
* none
*
* Returns:
* 0 initialization was successful
* errno initialization failed - reason indicated
*
*/
int
sscf_uni_start()
{
int err = 0;
sscf_uni_zone = uma_zcreate("sscf uni", sizeof(struct univcc), NULL,
NULL, NULL, NULL, UMA_ALIGN_PTR, 0);
if (sscf_uni_zone == NULL)
panic("sscf_uni_start: uma_zcreate");
/*
* Register stack service
*/
err = atm_stack_register(&sscf_uni_service);
return (err);
}
/*
* Terminate SSCF UNI processing
*
* This will be called just prior to unloading the module from memory. All
* signalling instances should have been terminated by now, so we just free
* up all of our resources.
*
* Called at splnet.
*
* Arguments:
* none
*
* Returns:
* 0 termination was successful
* errno termination failed - reason indicated
*
*/
int
sscf_uni_stop()
{
/*
* Any connections still exist??
*/
if (sscf_uni_vccnt) {
/*
* Yes, can't stop yet
*/
return (EBUSY);
}
/*
* Deregister the stack service
*/
(void)atm_stack_deregister(&sscf_uni_service);
uma_zdestroy(sscf_uni_zone);
return (0);
}
/*
* SSCF_UNI Stack Instantiation
*
* Called at splnet.
*
* Arguments:
* ssp pointer to array of stack definition pointers for connection
* ssp[0] points to upper layer's stack service definition
* ssp[1] points to this layer's stack service definition
* ssp[2] points to lower layer's stack service definition
* cvp pointer to connection vcc for this stack
*
* Returns:
* 0 instantiation successful
* errno instantiation failed - reason indicated
*
*/
static int
sscf_uni_inst(ssp, cvp)
struct stack_defn **ssp;
Atm_connvc *cvp;
{
struct stack_defn *sdp_up = ssp[0],
*sdp_me = ssp[1],
*sdp_low = ssp[2];
struct univcc *uvp;
int err;
ATM_DEBUG2("sscf_uni_inst: ssp=%p, cvp=%p\n", ssp, cvp);
/*
* Validate lower SAP
*/
if (sdp_low->sd_sap != SAP_SSCOP)
return (EINVAL);
/*
* Allocate our control block
*/
uvp = uma_zalloc(sscf_uni_zone, M_WAITOK);
if (uvp == NULL)
return (ENOMEM);
uvp->uv_ustate = UVU_INST;
uvp->uv_lstate = UVL_INST;
uvp->uv_connvc = cvp;
uvp->uv_toku = sdp_up->sd_toku;
uvp->uv_upper = sdp_up->sd_upper;
sscf_uni_vccnt++;
/*
* Store my token into service definition
*/
sdp_me->sd_toku = uvp;
/*
* Update and save input buffer headroom
*/
HEADIN(cvp, 0, 0);
/* uvp->uv_headin = cvp->cvc_attr.headin; */
/*
* Pass instantiation down the stack
*/
err = sdp_low->sd_inst(ssp + 1, cvp);
if (err) {
/*
* Lower layer instantiation failed, free our resources
*/
uma_zfree(sscf_uni_zone, uvp);
sscf_uni_vccnt--;
return (err);
}
/*
* Save and update output buffer headroom
*/
/* uvp->uv_headout = cvp->cvc_attr.headout; */
HEADOUT(cvp, 0, 0);
/*
* Save lower layer's interface info
*/
uvp->uv_lower = sdp_low->sd_lower;
uvp->uv_tokl = sdp_low->sd_toku;
return (0);
}
/*
* Abort an SSCF_UNI connection
*
* Called when an unrecoverable or "should never happen" error occurs.
* We just log a message and request the signalling manager to abort the
* connection.
*
* Arguments:
* uvp pointer to univcc control block
* msg pointer to error message
*
* Returns:
* none
*
*/
void
sscf_uni_abort(uvp, msg)
struct univcc *uvp;
char *msg;
{
/*
* Log error message
*/
log(LOG_ERR, "%s", msg);
/*
* Set termination states
*/
uvp->uv_ustate = UVU_TERM;
uvp->uv_lstate = UVL_TERM;
/*
* Tell Connection Manager to abort this connection
*/
(void) atm_cm_abort(uvp->uv_connvc, &sscf_uni_cause);
}
/*
* Print an SSCF PDU
*
* Arguments:
* uvp pointer to univcc control block
* m pointer to pdu buffer chain
* msg pointer to message string
*
* Returns:
* none
*
*/
void
sscf_uni_pdu_print(const struct univcc *uvp, const KBuffer *m, const char *msg)
{
char buf[128];
struct vccb *vcp;
vcp = uvp->uv_connvc->cvc_vcc;
snprintf(buf, sizeof(buf), "sscf_uni %s: vcc=(%d,%d)\n",
msg, vcp->vc_vpi, vcp->vc_vci);
atm_pdu_print(m, buf);
}